1. KAUTIR (Kerala Agricultural University Theses Information and Retrieval)

Permanent URI for this communityhttp://localhost:4000/handle/123456789/1

Browse

Has files: YesSubject: search.filters.subject.Gerbera

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Irrigation scheduling for potted gerbera (Gerbera jamesonii Bolus.) under rain shelter
    (Department of Floriculture and Landscaping, College of Agriculture, Vellayani, 2023-05-27) Bhuvana, C M.; Rafeekher, M
    The study entitled “Irrigation scheduling for potted Gerbera (Gerbera jamesonii Bolus.) under rain shelter’’ was undertaken with the objectives of evaluating different methods of irrigation and standardizing of irrigation schedule for the quantity of water and frequency of application. The study was conducted at the Department of Floriculture and Landscaping, College of Agriculture, Vellayani. Tissue culture plantlets of gerbera variety ‘Samara’ were planted in polybags (40cm×40cm) containing soil, sand, and coir pith mixed in a ratio of 1:1:1 as substrate. Fertilizer dose of 1.6g N, 1.6 g P2O5, and 1.6 g K2O were applied at monthly basis. Bimonthly application of 30 g dried cow dung manure and foliar application of 13:27:27 (0.4%) @ 100 ml per plant was also done. The experiment was laid out in Completely Randomized Design with two factors ie, irrigation method and water deficit level. Drip irrigation, wick irrigation, wick+supplementary overhead irrigation and overhead irrigation were the irrigation methods and 100%, 80% and 60% field capacity were the levels of water deficit. The daily water consumption of plants was calculated using gravimetric and the computed amount of water was added to compensate the transpiration loss to keep the plants at their appropriate soil moisture levels. Vegetative parameters, floral parameters, physiological parameters, yield, analysis of irrigation and computed parameters like survival percentage, water use efficiency and leaf area observations were taken at monthly intervals. Among the treatments, M1 (drip irrigation) recorded the higher for vegetative parameters like number of leaves (15.67) at 10 MAP, breadth of leaves (11.58cm) at 10 MAP and sucker yield (3.94) at 10 MAP. Overhead irrigation was significantly superior in plant spread (69.28cm) at 10 MAP. Highest leaf length was observed (32.76 cm) in wick and supplementary overhead irrigation at 5 MAP. The water deficit level at 60% field capacity produced significantly highest plant spread (68.57cm) at 10 MAP, number of leaves (14.08) at 9 MAP, length of leaves (31.68) at 6 MAP and breadth of leaves (9.93cm) at 9 MAP. The water deficit level at 100% field capacity was significantly superior in sucker yield. Plants provided with drip irrigation at 60% field capacity recorded significantly highest plant spread (75.73cm) at 6 MAP, number of leaves (20.67) at 10 MAP, breadth of leaves (14.20cm) at 10 MAP and sucker yield (4.83) at 9 MAP. Wick and supplementary overhead irrigation at 60% field capacity was significantly superior in leaf length (35.80cm) at 5 MAP. Regarding floral characters, drip irrigation with 60% field capacity recorded lowest value for number of days taken for bud initiation (23.82 days). Wick irrigation with 80% field capacity recorded lowest value for number of days taken from bud initiation to harvest (10.43 days). Highest flower longevity was observed in drip irrigation with 60% field capacity (8.14days). Highest flower characters were exhibited by drip irrigation at 60% field capacity (flower diamter-15.63cm, length of ray floret- 4.67cm,width of ray floret-1.10cm, length of flower stalk-55.83cm and girth of flower stalk-2.20cm). Most visually appealing flowers were produced in drip irrigation at 60% field capacity. Regarding yield parameters, highest flower yield (7.40) per plant per month was observed for drip irrigation with 60% field capacity at 9 MAP. There was no significant effect of irrigation methods and water deficit level on flower yield in relation to season. Among physiological parameters, no significant effect was observed on relative water content. In irrigation analysis, the highest irrigation frequency was exhibited for overhead irrigation with 60% field capacity (4.01days) at 9 MAP. The highest cumulative water transpired per plant (24940 ml) was observed in overhead irrigation with 100% field capacity at 10 MAP. Among computed parameters, the plants treated with drip irrigation at 60% field capacity showed 100% survival percent in two weeks and 90% in four weeks after planting. The highest interaction effect on water use efficiency (343.04g/ml) was observed in drip irrigation with combination of 60% field capacity at 10 MAP. Highest leaf area was observed in the treatment combination of drip irrigation at 60% field capacity (99.00cm²) at 10 MAP. The most economically feasible treatment combination was drip irrigation at 60% field capacity which recorded B.C ratio of 1.53. The results of the present study suggested that application of water at 60 % field capacity through drip irrigation system improved vegetative characters, flowering characters, flower yield and visual appearance of flowers in gerbera (Gerbera jamesonii Bolus.) variety ‘Samara’ growing under rain shelter followed by drip irrigation at 80% field capacity. The future line of work may be development of an automated precision farming technique and standardization of fertigation using different water-based nutrients in gerbera
  • No Thumbnail Available
    Item
    Response of Ascocenda orchid to growth regulator and micronutrients
    (Department of Floriculture and Landscaping, College of Horticulture, Vellanikkara, 2019) Jesabel George; Shobhana, A
    A study entitled ‘Response of Ascocenda orchid to growth regulator and micronutrients’ was carried out at Department of Floriculture and Landscaping, College of Horticulture Vellanikkara, from May 2018 to May 2019. Ascocenda is a monopodial, epiphytic, bigeneric hybrid, which is mainly grown as pot plant in hanging baskets using bricks, charcoal, coconut husk pieces etc. as growing media. The objective of the study was to evaluate the influence of foliar application of different micronutrient treatments on growth and yield of Ascocenda orchid. The experiment was conducted with eleven treatments viz., 0.01% zinc + 150 ppm benzyl adenine + PoP (T1), 0.025% zinc + 150 ppm benzyl adenine + PoP (T2), 0.01% manganese + 150 ppm benzyl adenine + PoP (T3), 0.025% manganese + 150 ppm benzyl adenine + PoP (T4), 0.01% boron + 150 ppm benzyl adenine + PoP (T5), 0.025% boron + 150 ppm benzyl adenine + PoP (T6), 0.01% iron + 150 ppm benzyl adenine + PoP (T7), 0.025% iron + 150 ppm benzyl adenine + PoP (T8), 0.01% molybdenum + 150 ppm benzyl adenine + PoP (T9), 0.025% molybdenum + 150 ppm benzyl adenine + PoP (T10), 150 ppm benzyl adenine + PoP (T11 – control). Three month old tissue cultured plants of Ascocenda var. Big Suksamran were used for the study. The micronutrients were applied at fortnightly intervals and benzyl adenine was applied at monthly intervals. Application of NPK (3:1:1) weekly twice @ 0.2% and cow dung slurry (1:5) at monthly intervals was given to all treatments as per PoP recommendation of KAU. Observations were taken at monthly intervals. The results indicated that foliar application of 0.025% manganese along with 150 ppm BA and recommended dose of NPK (T4) was best for improving plant height. The maximum plant height obtained at 12MAP was 8.86 cm. This was followed by T5 (8.81 cm) and T3 (8.63 cm) which were statistically on par with T4. The maximum shoot diameter was observed in T5 (10.20 mm) at 12 MAP which was on par with T4 and T3 (9.96 mm and 9.84 mm respectively). The treatment T3 was superior in terms of leaf characters like leaf length and leaf area up to 7 MAP and thereafter these parameters were highest in treatment T5. However, there was no significant difference between T5 and T3 in terms of leaf length at 12 MAP (16.70 cm and 16.48 cm respectively). The highest leaf area at 12 MAP was observed in T5 (23.17 cm2) followed by T3 (22.73 cm2). Number of leaves and leaf breadth were found highest with the application of 0.01% boron along with 150 ppm BA and recommended dose of NPK. A maximum of 13.69 leaves were observed in T5 at 12MAP. The maximum leaf breadth observed in T5 after 12 months of planting was 1.52 cm, which was closely followed by T3 and T4 (1.51 cm each), and no significant difference between these three treatments could be noticed. Regarding interval of leaf production, only 4 treatments (T3, T4, T5, and T11) could produce the highest number of eight leaves, within a period of 386 days. Among these, T4 took the shortest period of 337.45 days to produce the 8th leaf. T10 produced only five leaves within a period of 386 days. Among the root parameters, highest root length was observed in T3 (0.01% manganese + POP + 150 ppm BA) at 12 MAP (26.59 cm) whereas the treatment T4 (0.025% Mn + PoP + 150 ppm BA) was superior in terms of number of roots and root diameter. The best treatment with respect to number of roots varied during initial months, even though, from 6 MAP onwards, highest number of roots was observed in T4 with a value of 10.28 at 12 MAP. In the case of root diameter, a highest of 2.91 mm was recorded in T4 at 12 MAP, which was on par with T8 (2.86 mm), T3 (2.84 mm) and T5 (2.82 mm). Among the eleven treatments, T3 (Mn 0.01% + PoP + 150ppm BA), T4 (Mn 0.025% + PoP + 150ppm BA), and T5 (B 0.01% + PoP + 150ppm BA)were found to be best for improving the vegetative characters of Ascocenda orchid, while application of Mo @ 0.025% (T10) at fortnightly intervals was inhibitory to the plants in terms of all the vegetative characters studied. The objective of studying the floral and postharvest characters could not be achieved since the plant did not bloom within the period of study.
  • No Thumbnail Available
    Item
    Nutrient management in gerbera (Gerbera jamesonii Bolus.) grown under naturally ventilated polyhouse
    (Department of Pomology and Floriculture, College of Agriculture, Vellayani, 2018) Anaswara, S J; Sheela, V L
    The thesis work entitled “Nutrient management in gerbera (Gerbera jamesonii Bolus.) grown under naturally ventilated poly house” was carried out at the Department of Pomology and Floriculture, College of Agriculture, Vellayani during 2016-2018. The study was to assess the performance of five gerbera varieties to different doses of fertilizers with a view to find out the best fertilizer dose for each variety. This study also aimed for the standardization of nutrient management schedule for Gerbera jamesoniiBolus. Five varieties were selected for the study (V1- Beaudine, V2- Double date, V3- Mammut, V4- Esmara, V5- Aquamelon). Different nutrient treatments (N1- 10:10:10 N, P2O5, K2O g m-2, N2- 15:15:15 N, P2O5, K2O g m-2, N3- 20:20:20 N, P2O5, K2O g m-2) were applied to the varieties at monthly and fortnightly interval. The experiment was laid out in completely randomised design consisting of thirty treatment combinations and three replications. The study revealed that variety Beaudine was significantly superior in terms of vegetative parameters viz., plant spread (156.19cm) at 4 MAP, number of leaves (13.31) at 8 MAP and leaf length (37.09cm) at 4MAP. Variety Mammut was significantly superior in leaf breadth (11.03cm) at 10 MAP and number of suckers plantˉ1(2.59) at 6 MAP. The nutrient treatment 10:10:10 N, P2O5, K2O g mˉ2 produced significantly higher plant spread (171.29cm) at 10 MAP, number of leaves (12.54) at 6 MAP, leaf length (34.04cm) at 4 MAP, leaf breadth (12.35cm) at 4 MAP and number of suckers plant-1 (2.97) at 6 MAP. The level of split application of nutrients s1 showed significantly superior values for plant spread (148.86cm) at 4 MAP, number of leaves (10.95) at 8MAP, leaf length (31.67cm) at 4 MAP, leaf breadth (10.79cm) at 4MAP and number of suckers plantˉ1 (2.42) at 6MAP. The variety Esmara when treated with 10:10:10 N, P2O5, K2O g mˉ2 at monthly interval of split application of nutrients recorded significantly highest value for plant spread (183.38cm) at 10 MAP. Variety Beaudine treated with 10:10:10 N, P2O5, K2O g mˉ2 (1.6: 1.6: 1.6 N, P2O5, K2O g plantˉ1)at monthly interval of split application of nutrients recorded significantly higher values for number of leaves (15.23) at 6MAP and leaf length (46cm) at 4 MAP. Variety Mammut treated with 10:10:10 N, P2O5, K2O g mˉ2 split application of nutrients at monthly intervals recorded significantly higher values for leaf breadth (15.74cm) at 4 MAP and number of suckers plantˉ1 (3.89) at 6 MAP. Regarding the flowering characters, Variety Esmara treated with 10:10:10 N, P2O5, K2O g mˉ2 of split application of nutrients at monthly intervals recorded the lowest value for number of days taken for flowering (17) and variety Double date treated with 15:15:15 N, P2O5, K2O g mˉ2 at fortnightly interval of split application of nutrients recorded lowest value for number of days taken from bud initiation to harvest (7.9) and there was no significant difference on flower longevity on the plant. In flower characters, Mammut variety supplied with a combination of 10:10:10 N, P2O5, K2O g mˉ2 fertilizers at monthly interval of split application of nutrients recorded highest flower diameter (11.24cm) and width of ray florets (1.00cm).There was no significant difference observed for flower disc diameter and length of the ray florets. Esmara variety with a combination of 10:10:10 N, P2O5, K2O g mˉ2 fertilizers at monthly interval of split application of nutrients recorded the highest number of ray florets (65.01).Beaudine variety with a combination of 10:10:10 N, P2O5, K2O g mˉ2 fertilizers at monthly interval of split application of nutrients recorded the highest stalk girth (2.39cm) and stalk length (79.34cm). In yield parameters, highest number of flowers produced plant-1year-1(25.75) and higher yield of flowers in relation to season (15.25) at rainy season was recorded for variety Esmara treated with a combination of 10:10:10 N, P2O5, and K2O g mˉ2 with a split application of nutrients at monthly intervals. The vase life of flowers and water uptake showed no significant difference among the treatment combinations All the five varieties while treated with 10:10:10 N, P2O5, K2O g mˉ2 at monthly intervals resulted high values for vegetative, flower and flowering characters. The best performance for Beaudine followed by Esmara and Aquamelon. BC ratio was highest for Beaudine. Future line of work may be standardisation of agrotechniques for gerbera under Kerala conditions.
  • No Thumbnail Available
    Item
    Performance of african marigold (Tagetes erecta L.) under different growing condition
    (Department of Pomology and Floriculture, College of Horticulture, Vellanikkara, 2016) Nimisha Augustine; Sobhana, A